OFFSET
1,1
COMMENTS
a(12)=0 since the concatenation of 37 with itself, followed by a 7, is always composite. a(14), the term relative to 43, is a prime with 1089 digits. - Giovanni Resta, Apr 07 2006
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Mar 28 2004
EXTENSIONS
More terms from Giovanni Resta, Apr 07 2006
STATUS
approved